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71.
Martens K Amarell M Parvez K Hittel K De Caigny P Ito E Lukowiak K 《Neurobiology of learning and memory》2007,88(2):232-242
Repeated spaced training sessions of contingent tactile stimulation to the pneumostome as it opens are required to cause long-term memory (LTM) formation of aerial respiratory behaviour making if difficult to determine exactly when memory forms. We have devised a single-trial aversive operant conditioning training procedure in Lymnaea to be better able to elucidate the causal mechanisms of LTM formation. Observations of baseline breathing behaviour in hypoxia were first made. Twenty-four hours later the snails were trained using the single trial procedure, by placing them in a small Petri dish containing 4 ml of 25 mM KCl for 30-35s as soon as the first pneumostome opening in hypoxia was attempted. LTM was present if (1) breathing behaviour following training was significantly less than before; and (2) breathing behaviour post-training was significantly less in experimental groups than in yoked control groups. LTM persisted for 24 h but not 48 h. Yoked controls that received an aversive stimulus not contingent with pneumostome opening had no evidence of memory. Cooling directly after, but not at any other time, blocks LTM formation. LTM formation was also prevented by removal of the cell body of the neuron RPeD1 before training. 相似文献
72.
Gallo LC de Los Monteros KE Shivpuri S 《Current directions in psychological science》2009,18(5):269-274
ABSTRACT— A robust, linear association between socioeconomic status (SES) and health has been identified across many populations and health outcomes. This relationship is typically monotonic, so that each step down the SES hierarchy brings increased vulnerability to disease and premature mortality. Despite growing attention to health disparities, scientists and policymakers have made little progress toward confronting their causes and implementing effective solutions. Using the reserve capacity model ( Gallo & Matthews, 2003 ) as an organizing framework, the current article examines the contribution of resilient psychosocial resources to socioeconomic disparities in physical health. Findings suggest that deficient psychosocial resources, such as low perceptions of control and social support, may be one of many factors that connect low SES with poor health. Additional research is needed to test these relationships and their underlying mechanisms, to consider interventions to enhance reserve capacity, and to evaluate the efficacy of such efforts in fostering resilience to socioeconomic hardship. 相似文献
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Experiments have shown that people can rapidly determine if categories such as "animal" or "beach" are present in scenes that are presented for only a few milliseconds. Typically, observers in these experiments report on one prespecified category. For the first time, we show that observers can rapidly extract information about multiple categories. Moreover, we demonstrate task-dependent interactions between accumulating information about different categories in a scene. This interaction can be constructive or destructive, depending on whether the presence of one category can be taken as evidence for or against the presence of the other. 相似文献
76.
Numerous studies have shown that musicians outperform nonmusicians on a variety of tasks. Here we provide the first evidence that musicians have superior auditory recognition memory for both musical and nonmusical stimuli, compared to nonmusicians. However, this advantage did not generalize to the visual domain. Previously, we showed that auditory recognition memory is inferior to visual recognition memory. Would this be true even for trained musicians? We compared auditory and visual memory in musicians and nonmusicians using familiar music, spoken English, and visual objects. For both groups, memory for the auditory stimuli was inferior to memory for the visual objects. Thus, although considerable musical training is associated with better musical and nonmusical auditory memory, it does not increase the ability to remember sounds to the levels found with visual stimuli. This suggests a fundamental capacity difference between auditory and visual recognition memory, with a persistent advantage for the visual domain. 相似文献
77.
Karla G. Van Leeuwen Angèle Fauchier Murray A. Straus 《Journal of psychopathology and behavioral assessment》2012,34(2):216-231
This study examines the advisability to distinguish dimensions of discipline, by evaluating the Dimensions of Discipline Inventory
(DDI, Straus and Fauchier 2007) in a sample of Belgian undergraduate students (N = 371) who retrospectively reported on their mothers’ and fathers’ discipline behaviors aimed at correcting child misbehavior
at age 10. First, confirmatory factor analyses showed that a model with nine factors fitted the data best, but also a model
with four second-order factors was acceptable. Second, a multigroup confirmatory factor analysis with a Belgian and a U.S.
sample (N = 633) provided additional evidence for the nine-factor structure. Correlations between DDI scales and other parenting related
variables demonstrated meaningful relations. Additionally, some DDI subscales were associated with measures of current problem
behavior. To conclude, the present study illustrated that it is both useful and possible to differentiate between discipline
constructs. 相似文献
78.
De Clercq B De Fruyt F Van Leeuwen K Mervielde I 《Journal of abnormal psychology》2006,115(4):639-657
The present study describes the construction of a taxonomy of trait-related symptoms in childhood, the Dimensional Personality Symptom Item Pool (DIPSI), and examines the replicability of the taxonomy's higher order structure across maternal ratings of referred (N = 205) and nonreferred (N = 242) children and self-ratings of adolescents (N = 453). The DIPSI's 4 higher order factors--that is, Emotional Instability, Disagreeableness, Introversion, and Compulsivity--showed clear correspondence with the dimensions of personality pathology found in adulthood (Dimensional Assessment of Personality Pathology-Basic Questionnaire; W. J. Livesley, 1990; Schedule for Nonadaptive and Adaptive Personality; L. A. Clark, 1993). These 4 factors can be further organized into 2 superfactors, representing Internalizing and Externalizing Traits, demonstrating empirical and conceptual relationships with psychopathology models in childhood and adulthood. The implications for the assessment and conceptualization of early trait pathology are discussed in the context of an integrative developmental perspective on the construction of the Diagnostic and Statistical Manual of Mental Disorders-Fifth Edition. 相似文献
79.
Structural, mean- and individual-level, differential, and ipsative personality continuity were examined in 599 patients treated for major depression assigned to 1 of 6 forms of a 6-month pharmaco-psychotherapy program. Covariation among traits from the Five Factor model remained invariant across treatment, and patients described themselves as slightly more extraverted, open to experience, agreeable and conscientious, and substantially more emotional stable after treatment. Trait changes were only to a small extent explained by changes in depression severity. There was evidence for differential, individual-level, and ipsative stability, with stable personality profiles in terms of shape and to a lesser extent in terms of scatter and elevation. Traits remain relatively stable, except for emotional stability, despite the depressive state and the psychopharmacological interventions. 相似文献
80.
Karla F. C. Holloway 《Journal of psycholinguistic research》1986,15(2):141-151
This report describes preliminary results of a research project to determine the effects of basal readers on productive and responsive (P/R) language. The research population consisted of 25 kindergarten and first-grade children, average age 6 years 4 months. Each child met with the interviewer three times: (1) to elicit a natural language sample, (2) to elicit (P/R) language following oral reading of a basal text, and (3) to elicit (P/R) language following oral reading of a story whose language matched, in complexity and length, their natural language sample. Results indicated that after children read a basal text, P/R language was significantly lower than their natural language. After children read a story whose language matched their natural language, P/R language was not significantly different from their natural language sample. The study implies that basal readers' language structures have a deleterious effect on (P/R) language of readers in their oral reactions to text. 相似文献